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watchdog: f71808e_wdt: Add F81803 support 

This adds watchdog support for the Fintek F81803 Super I/O chip.

Testing was done on the Seneca XK-QUAD.

Signed-off-by: Jaret Cantu <jaret.cantu@timesys.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20190912175550.9340-1-jaret.cantu@timesys.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
alistair/sunxi64-5.4-dsi
Jaret Cantu 2019-09-12 13:55:50 -04:00 committed by Wim Van Sebroeck
parent 52a142140e
commit ca2fc5efff
2 changed files with 18 additions and 3 deletions
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4
drivers/watchdog/Kconfig
View File

@ -1043,8 +1043,8 @@ config F71808E_WDT
depends on X86
help
This is the driver for the hardware watchdog on the Fintek F71808E,
F71862FG, F71868, F71869, F71882FG, F71889FG, F81865 and F81866
Super I/O controllers.
F71862FG, F71868, F71869, F71882FG, F71889FG, F81803, F81865, and
F81866 Super I/O controllers.
You can compile this driver directly into the kernel, or use
it as a module. The module will be called f71808e_wdt.

17
drivers/watchdog/f71808e_wdt.c
View File

@ -31,8 +31,10 @@
#define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */
#define SIO_REG_DEVREV 0x22 /* Device revision */
#define SIO_REG_MANID 0x23 /* Fintek ID (2 bytes) */
#define SIO_REG_CLOCK_SEL 0x26 /* Clock select */
#define SIO_REG_ROM_ADDR_SEL 0x27 /* ROM address select */
#define SIO_F81866_REG_PORT_SEL 0x27 /* F81866 Multi-Function Register */
#define SIO_REG_TSI_LEVEL_SEL 0x28 /* TSI Level select */
#define SIO_REG_MFUNCT1 0x29 /* Multi function select 1 */
#define SIO_REG_MFUNCT2 0x2a /* Multi function select 2 */
#define SIO_REG_MFUNCT3 0x2b /* Multi function select 3 */
@ -49,6 +51,7 @@
#define SIO_F71869A_ID 0x1007 /* Chipset ID */
#define SIO_F71882_ID 0x0541 /* Chipset ID */
#define SIO_F71889_ID 0x0723 /* Chipset ID */
#define SIO_F81803_ID 0x1210 /* Chipset ID */
#define SIO_F81865_ID 0x0704 /* Chipset ID */
#define SIO_F81866_ID 0x1010 /* Chipset ID */
@ -108,7 +111,7 @@ MODULE_PARM_DESC(start_withtimeout, "Start watchdog timer on module load with"
" given initial timeout. Zero (default) disables this feature.");
enum chips { f71808fg, f71858fg, f71862fg, f71868, f71869, f71882fg, f71889fg,
f81865, f81866};
f81803, f81865, f81866};
static const char *f71808e_names[] = {
"f71808fg",
@ -118,6 +121,7 @@ static const char *f71808e_names[] = {
"f71869",
"f71882fg",
"f71889fg",
"f81803",
"f81865",
"f81866",
};
@ -370,6 +374,14 @@ static int watchdog_start(void)
superio_inb(watchdog.sioaddr, SIO_REG_MFUNCT3) & 0xcf);
break;
case f81803:
/* Enable TSI Level register bank */
superio_clear_bit(watchdog.sioaddr, SIO_REG_CLOCK_SEL, 3);
/* Set pin 27 to WDTRST# */
superio_outb(watchdog.sioaddr, SIO_REG_TSI_LEVEL_SEL, 0x5f &
superio_inb(watchdog.sioaddr, SIO_REG_TSI_LEVEL_SEL));
break;
case f81865:
/* Set pin 70 to WDTRST# */
superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT3, 5);
@ -809,6 +821,9 @@ static int __init f71808e_find(int sioaddr)
/* Confirmed (by datasheet) not to have a watchdog. */
err = -ENODEV;
goto exit;
case SIO_F81803_ID:
watchdog.type = f81803;
break;
case SIO_F81865_ID:
watchdog.type = f81865;
break;